【摘 要】
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A membrane with high stability and ion conductivity in wide pH range is essential for energy storage devices.Here,we report a novel membrane with hierarchical c
【机 构】
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Division of Energy Storage, Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of C
论文部分内容阅读
A membrane with high stability and ion conductivity in wide pH range is essential for energy storage devices.Here,we report a novel membrane with hierarchical core-shell structure,which demonstrates high stability and ion conductivity,simultaneously under a wide pH range applications.Spectral characterizations and theoretical calculation indicate that the non-solvent induces the chain segment configuration and eventually leads to polymer-polymer phase separation,thus forming hierarchical porous core-shell structure.Benefiting from this structure,an acidic vanadium flow battery (VFB) with such a membrane shows excellent performance over 400 cycles with an energy efficiency (EE) of above 81％ at current density of 120 mA cm-2 and an alkaline zinc-iron flow battery (AZIFB) delivers a cycling stability for more than 200 cycles at 160 mA cm-2,along with an EE of above 82％.This paper provides a cost-effective and simple way to fabricate membranes with high performance for variety of energyrelated devices.
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